Ultra Pure High-Potency 5.0% Niacinamide Serum
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A concentrated 5% Niacinamide serum for oily skin made with only 10 ingredients that visibly reduces excess oil and shine.
25% off
36
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Before and After

Our Niacinamide facial serum for oily skin visibly reduces surface oil and shine, and improves the look of smooth and even skin:
After 1 Week, 92% Agree Skin Feels Soothed**
Reduced Blemishes in 1 Week***
Instantly Reduces Excess Oil by 58%*
After 1 Week, 92% Agree Skin Feels Soothed**
Reduced Blemishes in 1 Week***
*Instrumental measurement in a 4-week clinical study.
**Reported by consumers in a 4-week study.
***Expert grading in a 4-week clinical study.
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Why We Love It

Minimally formulated with only 10 ingredients, our concentrated 5% Niacinamide serum has a fast-absorbing texture allows actives to be rapidly delivered into the skin to visibly reduce excess oil and provide targeted efficacy for your top skin concerns.
Find Your Formula
Ultra Pure High-Potency 5.0% Niacinamide Serum | Ultra Pure High-Potency 9.8% Glycolic Acid Serum | Ultra Pure High-Potency 1.5% Hyaluronic Acid Serum |
---|---|---|
Skin Type All Types Dry Oily Combination Normal Sensitive | Skin Type All Types Dry Oily Combination Normal Sensitive | Skin Type All Types Dry Oily Combination Sensitive Normal |
Skin Concern Uneven Skin Tone Blemishes Oily Skin / Acne | Skin Concern Enlarged Pores Uneven Skin Tone Tone & Texture Dull Skin | Skin Concern Dryness |
Size One size only for Ultra Pure High-Potency 5.0% Niacinamide Serum 1.0 fl oz / 30 ml | Size One size only for Ultra Pure High-Potency 9.8% Glycolic Acid Serum 1.0 fl oz / 30 ml | Size One size only for Ultra Pure High-Potency 1.5% Hyaluronic Acid Serum 1.0 fl oz / 30 ml |
Price Old price New price $36.00 | Price Old price New price $36.00 | Price Old price New price $36.00 |
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Expert Advice

“We wanted to deliver known skin actives, such as Niacinamide, Glycolic Acid and Hyaluronic Acid in their pure form in simple formulations without too many ingredients to deliver efficacy, layer well into a skin regimen and allow users to customize their skin care according to their needs. The simplified formulas ensure the ingredients absorb fully into the skin. Our Ultra Pure High-Potency Serum 5% Niacinamide helps reduce excessive sebum, visible redness, and the appearance of blemishes.”
Kiehl’s Global Scientific Director Dr. Nancy Ilaya PhD
Kiehl’s Global Scientific Director Dr. Nancy Ilaya PhD